Games like Untravelled Planet
Games like Untravelled Planet include Sonic Frontiers, Warhammer 40,000: Space Marine 2, Ratchet & Clank: Rift Apart, COCOON, and Trailmakers. We matched them by the tags players give Untravelled Planet on Steam (Indie, Exploration, Third-Person Shooter, 3D Platformer, and Puzzle Platformer): closest matches first, and among equally close ones the better-known games.

Sonic Frontiers
Shared: 3D Platformer · Exploration · Action

Warhammer 40,000: Space Marine 2
Shared: Third-Person Shooter · Action · Action-Adventure

Ratchet & Clank: Rift Apart
Shared: 3D Platformer · Action-Adventure · Third-Person Shooter

COCOON
Shared: Exploration · Indie · Puzzle Platformer

Trailmakers
Shared: Action · Space · Action-Adventure

Supraland
Shared: Exploration · Puzzle Platformer · 3D Platformer

Kena: Bridge of Spirits
Shared: Exploration · Action-Adventure · Action

Trine 3: The Artifacts of Power
Shared: Puzzle Platformer · 3D Platformer · Action-Adventure

Marvel's Guardians of the Galaxy
Shared: Third-Person Shooter · Action-Adventure · Action

Tomb Raider Game of the Year
Shared: Action · Third-Person Shooter · Exploration

The Callisto Protocol™
Shared: Third-Person Shooter · Action-Adventure · Sci-fi

Pumpkin Jack
Shared: Indie · 3D Platformer · Action

The Gunk
Shared: Action-Adventure · 3D Platformer · Exploration

Squirrel with a Gun
Shared: Third-Person Shooter · Action · 3D Platformer

Journey To The Savage Planet
Shared: Exploration · 3D Platformer · Action-Adventure

Yooka-Laylee
Shared: Indie · 3D Platformer · Exploration

Galaxy on Fire 2™ Full HD
Shared: Exploration · Third-Person Shooter · Space

Trine Enchanted Edition
Shared: Puzzle Platformer · Action-Adventure · Indie

PRAGMATA
Shared: Third-Person Shooter · Action · Sci-fi

Yellow Taxi Goes Vroom
Shared: Indie · 3D Platformer · Exploration

Deliver Us The Moon
Shared: Indie · Action · Exploration

Rise of the Tomb Raider™
Shared: Exploration · Action · Action-Adventure

Orbo's Odyssey
Shared: 3D Platformer · Action-Adventure · Action

Tomb Raider IV-VI Remastered
Shared: Action · Action-Adventure · 3D Platformer